(Answered)-A statistics teacher wants to see if there is any difference in - (2025 Updated Original AI-Free Solution

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Academic Level: Undergrad. (yrs 3-4)

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Pages: 5 Words: 1375

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Question

A statistics teacher wants to see if there is any difference in the abilities of students enrolled in statistics today and those enrolled five years ago. A sample of final examination scores from students enrolled today and from students enrolled five years ago was taken. You are given the following information.

?????????????? ?????????????? Today (Population 1)?????? Five Years Ago (Population 2)

Sample Mean???? ?????????????? 83????????????????????????? ?????????????? 88

Sample Variance ? ? ? ? ? ?112.5 ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? 54

Sample Size ? ? ? ? ? ? ? ? ? ? ? 45 ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?36

The 92.50% confidence interval for the difference between the two population means is

(Round your answers to 2 decimal places.)